/*-+-*****************************************************************************
 Copyright (C) 2009-2012 Oceanside Software Corporation (R)
 Dallas, Texas

 Author       : Jason T. Brower
 Purpose      : This file is part of a point-of-sale software package
                originally written for Table-Service Restaurants.
              
 Date         : July 8th of 2012
              
 History      : The application that this software file belongs to was 
                written over a 3-Year period.  The first version was written
                in C# .Net 3.5 using Windows Forms.  Being new to .Net at
                the time, I soon learned of Windows Presentation Foundation,
                liked the graphics capabilities and databinding so I
                migrated to WPF.  When the .Net 4.0 framework was released
                the application was migrated from 3.5 to 4.0. Now today,
                .Net 4.5 RC is out and I was already in process of migrating
                before I made this public.
                
Excuse Me     : Please excuse the coding style, it is not representative of
                my typical work.  During the three years I was under a very
                tight budget, constantly running out of funding and was 
                working 18 hour days hyped up on 5-Hour Energy.  The 
                design is not textbook.  It is monolythic because of
                previous issues I will not get into.  There are few comments
                in the code and the ones that are there may be incorrect.
                
What it is not: This is not the exact version that I took through PA-DSS 2.0
                nor is it the exact version running at my customer sites.
                I removed some details for security purposes including some
                encryption algorithms.  The reporting was removed because
                I was including a third party library that cannot be 
                published with this Open Source.
                
What it is    : This application has been running at high volume restaraunts
                for over a year.  It never freezes, crashes or does anything
                unexpected.  So long as it is built, installed and configured
                correctly, it is a strong system that we can all enhance.

Contact       : Please note that I can no longer work for free.  However, you
                can reach me at information@oceansidesw.com.                                                      

*********************************************************************************/
using System;
using System.Linq;
using System.Windows.Data;

namespace Oceanside
{
    public class DecimalToDollarConverter : IValueConverter
    {
        /// <summary>
        /// 
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="targetType"></param>
        /// <param name="parameter"></param>
        /// <param name="culture"></param>
        /// <returns></returns>
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            String dollarString = "";
            try
            {
                if (value is Decimal)
                {
                    Decimal decValue = (Decimal)value;

                    if (parameter is string)
                    {
                        bool isTrue = (parameter as string).Equals("true");
                        if (isTrue && decValue < 0)
                        {
                            decValue = 0;
                        }
                    }

                    dollarString = decValue.ToString("c");
                }
            }
            catch (Exception exc)
            {
                Constants.ErrorDispatcher.Notify(Error.EType.E_CVT_DCIM_TO_DOLL, exc);
            }
            return dollarString;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static Boolean VerifiedDecimalStringFromMoney(ref String str)
        {
            if (str.First() == '$')
            {
                str = str.Substring(1, str.Length - 1);
            }

            return StringIsNumeric(str, true);
        }

        public static bool StringIsNumeric(string str, Boolean skipDecimalPoint = true)
        {
            foreach (char c in str)
            {
                if (skipDecimalPoint)
                {
                    if (!Char.IsNumber(c) && (c != '.')) return false;
                }
                else
                {
                    if (!Char.IsNumber(c)) return false;
                }
            }

            return true;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="targetType"></param>
        /// <param name="parameter"></param>
        /// <param name="culture"></param>
        /// <returns></returns>
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            Decimal returnValue = 0M;
            try
            {
                if (value != null)
                {
                    String stringVal = (String)value;

                    if (VerifiedDecimalStringFromMoney(ref stringVal))
                    {
                        returnValue = Decimal.Parse(stringVal);

                        if (parameter is string)
                        {
                            bool isTrue = (parameter as string).Equals("true");
                            if (isTrue && returnValue < 0)
                            {
                                returnValue = 0;
                            }
                        }
                    }
                }
            }
            catch (Exception exc)
            {
                Constants.ErrorDispatcher.Notify(Error.EType.E_CVT_DCIM_TO_DOLL, exc);
            }
            return returnValue;
        }
    }
}

